Threatening to burn my house down now, huh? Let's see you try.*Roshambo » Today, 7:49 am » wrote: ↑ To test a smoke detector, locate the test button on the cover and press and hold it down for about 5 to 10 seconds. A loud, piercing siren should sound, confirming the battery, electronics, and horn are working properly. Test your alarms at least once a month